TCP Port Status Tool
By PcWinTech.com

Need help forwarding your ports? Visit www.pcwintech.com for free guides, screenshots & more.
For a hassle free way to forward your ports for free visit www.simpleportforwarding.com

Note: In order for you to properly test if a port is open or closed a program must be using the port on your system and accept incoming connections. Even if the port is not blocked by your router or firewall the test will still fail if nothing accepts the incoming connection attempt.

If you need help allowing ports through your router please visit www.pcwintech.com for port forwarding & port triggering guides. Also the Simple Port Forwarding program takes the pain of port forwarding away making it simple for the user. The program is free and supports many routers with more being added weekly.